We who are strong have an obligation to bear with the failings of the weak, and not to please ourselves. Let each of us please his neighbor for his good, to build him up.
This From the Nations
It is easier to know how to do than it is to do.—Chinese proverb
No man can do nothing and no man can do everything.—German proverb
What is done cannot be undone.—Italian proverb
And this from Jesus, Lord of the nations:
For I have given you an example, that you also should do just as I have done to you.—John 13:15