Romans 15:1-6, AMP
1WE WHO are strong [in our convictions and of robust faith] ought to bear with the failings and the frailties and the tender scruples of the weak; [we ought to help carry the doubts and qualms of others] and not to please ourselves.2Let each one of us make it a practice to please (make happy) his neighbor for his good and for his true welfare, to edify him [to strengthen him and build him up spiritually].3For Christ did not please Himself [gave no thought to His own interests]; but, as it is written, The reproaches and abuses of those who reproached and abused you fell on Me.(A)4For whatever was thus written in former days was written for our instruction, that by [our steadfast and patient] endurance and the encouragement [drawn] from the Scriptures we might hold fast to and cherish hope.5Now may the God Who gives the power of patient endurance (steadfastness) and Who supplies encouragement, grant you to live in such mutual harmony and such full sympathy with one another, in accord with Christ Jesus,6That together you may [unanimously] with united hearts and one voice, praise and glorify the God and Father of our Lord Jesus Christ (the Messiah).
Behavior towards the weak…
(About the following commentary: Matthew Henry's Concise Commentary on the Bible is available in the Public Domain.)
Christian liberty was allowed, not for our pleasure, but for the glory of God, and the good of others. We must please our neighbor, for the good of his soul; not by serving his wicked will, and humoring him in a sinful way; if we thus seek to please men, we are not the servants of Christ. Christ's whole life was a self-denying, self-displeasing life. And he is the most advanced Christian, who is the most conformed to Christ. Considering his spotless purity and holiness, nothing could be more contrary to him, than to be made sin and a curse for us, and to have the reproaches of God fall upon him; the just for the unjust. He bore the guilt of sin, and the curse for it; we are only called to bear a little of the trouble of it. He bore the presumptuous sins of the wicked; we are called only to bear the failings of the weak. And should not we be humble, self-denying, and ready to consider one another, who are members one of another?
The Scriptures are written for our use and benefit, as much as for those to whom they were first given. Those are most learned who are most mighty in the Scriptures. That comfort which springs from the word of God, is the surest and sweetest, and the greatest stay to hope. The Spirit as a Comforter, is the earnest of our inheritance. This like-mindedness must be according to the precept of Christ, according to his pattern and example. It is the gift of God; and a precious gift it is, for which we must earnestly seek unto him.
Our Divine Master invites his disciples, and encourages them by showing himself as meek and lowly in spirit. The same disposition ought to mark the conduct of his servants, especially of the strong towards the weak. The great end in all our actions must be, that God may be glorified; nothing more forwards this, than the mutual love and kindness of those who profess religion. Those that agree in Christ may well agree among themselves. (Ro 15:8-13)