Galatians 6:5 - Matthew Poole's English Annotations on the Holy Bible

That is, God will judge every man in the last day, according not to what others have done, but to what he himself hath done, 1 Corinthians 3:8. Therefore every one is concerned to prove his own work; for at last his eternal joy and rejoicing, or sorrow and mourning, shall be according to what he himself hath wrought, not according to what others have wrought. If ever they enter into the joy of heaven, they shall rejoice in their own work. And if eternal sorrow be their portion, they shall groan under their own burdens; they will not be the sins of others, but their own sins, which will sink them into eternal misery. For though superiors shall answer to God for the sins of their inferiors, yet it shall not properly be for their inferiors sins, but for their own sins, in neglecting to warn and to reprove them, and to do what in them lay to have hindered them in their sinful courses.