Romans 15:1-3
(1) We then that are strong ought to bear the infirmities of the weak, and not to please ourselves.
(2) Let every one of us please [his] neighbor for [his] good to edification.
(3) For even Christ pleased not himself; but, as it is written, The reproaches of them that reproached thee fell on me.

Certainly Paul was not forgetting the physical ailments that afflict people. But Paul was also expounding on the second commandment -- love thy neighbor even as yourself. One of the definitions of infirmity is a failing or defect in a person's character. In 1 Corinthians Paul specifically addresses that our liberties through Christ shall not be a stumbling block for our brothers lest we sin against Jesus Christ:

1Corinthians 8:9-13
(9) But take heed lest by any means this liberty of yours become a stumblingblock to them that are weak.
(10) For if any man see thee which hast knowledge sit at meat in the idol's temple, shall not the conscience of him which is weak be emboldened to eat those things which are offered to idols;
(11) And through thy knowledge shall the weak brother perish, for whom Christ died?
(12) But when ye sin so against the brethren, and wound their weak conscience, ye sin against Christ.
(13) Wherefore, if meat make my brother to offend, I will eat no flesh while the world standeth, lest I make my brother to offend.

Paul is clear. In order not to cause a brother offense he would not eat sacrificed meat if the brother were offended. Surely with Paul there were no exceptions. So had Paul not eaten for a day he would starve if only meat were available yet a weaker brother were offended. In Paul's liberty, he was able to eat that meat after giving thanks to God; yet he was the stronger and willing to bear the infirmity of his weaker brother by not eating. Notwithstanding, in chapter 10 of 1 Corinthians Paul also clarifies his liberty in Christ, why can he be judged by a another mans conscious?

1Corinthians 10:29
(29) Conscience, I say, not thine own, but of the other: for why is my liberty judged of another [man's] conscience?

Paul goes on to explain that all food is good to eat since it is supplied by God, no matter what another person might think. Yet a weaker person who felt this was a sin would indeed be guilty of sin if they had eaten the food sacrificed, while Paul would not be guilty of sin.

Today would a woman even consider putting on a different shirt or dress if a man felt she tempted him? Would a man ever consider putting on long pants if his speedo were to offend and tempt even one woman?

So that Paul would not be a stumbling block to a brother who might sin because of Paul's liberties; he simply would not eat meat sacrificed if a weaker person present felt that Paul was sinning. Today this would be equivalent to a person not drinking an alcoholic beverage because a weaker person felt that drinking alcohol is a sin. Alcohol is certainly not a sin to drink; being a drunkard is sin. Paul reminds the Romans, who were pagan worshippers, that every man must be fully persuaded in his own heart.

Romans 14:1-5
(1) Him that is weak in the faith receive ye, [but] not to doubtful disputations.
(2) For one believeth that he may eat all things: another, who is weak, eateth herbs.
(3) Let not him that eateth despise him that eateth not; and let not him which eateth not judge him that eateth: for God hath received him.
(4) Who art thou that judgest another man's servant? to his own master he standeth or falleth. Yea, he shall be holden up: for God is able to make him stand.
(5) One man esteemeth one day above another: another esteemeth every day [alike]. Let every man be fully persuaded in his own mind.

Today things are different:

Have you ever heard a conversation or been involved in one where a Christian will state: "...so, that's not my fault if they don't like it, I am not changing." For instance, when a woman wears a low cut blouse that will reveal cleavage is she at fault because a man who is tempted then looks down her shirt? Many woman will say it is the man's fault, he shouldn't be looking down her shirt. Likewise should a man with ripped abs go topless in public or wear a speedo bathing suit? Is it his fault that a woman may stare and lust for him?

According to the apostle Paul, we should not be a stumbling block for brothers and sisters, yet this "I am not changing" attitude is so prevalent in society today. It is part of the greater apostasy: "I am going to do what I want, it is your fault if you can't handle it". Not too Christian like, is it?

Today few people if anyone offers food to idols wherein a follower of Christ must decide whether to eat it or not. Instead we have the liberties and sins of our culture and misunderstandings of society today. None-the-less, the Word is, do not be a stumbling block for a brother or sister because you are really sinning against Christ. This is quite a cross to bear in today's secular and pluralistic world. So how do we carry our own cross and bear the infirmities of others?

Paul has an answer, "...and not to please ourselves" This self sacrificing attitude, which is one of love for our neighbors, is the very life that our Lord Jesus Christ preached and lived. Jesus lived what He preached and believed, yet today how many Christians live what they believe? How many Christians today will go to church on Sunday only to fornicate, gamble, desire worldly possessions, gossip, backstab workers, get even with someone, be rude in traffic, lust, or show no consideration to their neighbors during the remainder of the week?. Almost 70% of Americans believe they are Christian, yet the country is polarized. The 32% who do not identify themselves as Christians are not causing all the problems. Simply put, many Christians are either weak and lukewarm, or just don't want to live the life Jesus taught us to live.

Not everyone is strong, and many, many Christians simply believe that going to church covers their obligation to God. Yet God was very clear, first love Him and worship Him with all our heart, and mind and soul, and body, then love our neighbors as our selves. In today's terms this equates to extreme and unselfish consideration for one another, patience and a high degree of tolerance, quick to listen and not to speak, it is how we carry our cross. Without it, a Christian is at best lukewarm, and will always remain a babe. Not able to discern for themselves good and evil. Of course the ability to truly discern good from evil will be important for identifying the false prophet when he arrives.

Hebrews 5:12
(12) For when by reason of the time ye ought to be teachers, ye have need again that some one teach you the rudiments of the first principles of the oracles of God; and are become such as have need of milk, and not of solid food.