Sin Of Omission.
Therefore, to him who knows to do good and does not do it, to him it is sin. James 4:17 NKJV
We are taught, in the whole of our conduct, to act up to our own convictions, and, whether we have to do with God or men, to see that we never go contrary to our own knowledge: To him that knoweth to do good, and doeth it not, to him it is sin it is aggravated sin it is sinning with a witness and it is to have the worst witness against his own conscience.
Observe, This stands immediately connected with the plain lesson of saying, If the Lord will, we shall do this or that they might be ready to say, "This is a very obvious thing who knows not that we all depend upon almighty God for life, and breath, and all things?" Remember then, if you do know this, whenever you act unsuitably to such a dependence, that to him that knows to do good, and does it not, to him it is sin, the greater sin. 2. Omissions are sins which will come into judgment, as well as commissions. He that does not the good he knows should be done, as well as he who does the evil he knows should not be done, will be condemned. Let us therefore take care that conscience be rightly informed, and then that it be faithfully and constantly obeyed for, if our own hearts condemn us not, then have we confidence towards God but if we say, We see, and do not act suitably to our sight, then our sin remaineth, John 9:41