KJV - And I myself also am persuaded of you, my brethren, that ye also are full of goodness, filled with all knowledge, able also to admonish one another.
ASV - And I myself also am persuaded of you, my brethren, that ye yourselves are full of goodness, filled with all knowledge, able also to admonish one another.
BBE - And I myself am certain of you, brothers, that you are full of what is good, complete in all knowledge, able to give direction to one another.
WEB - I myself am also persuaded about you, my brothers{The word for "brothers" here and where context allows may also be correctly translated "brothers and sisters" or "siblings."}, that you yourselves are full of goodness, filled with all knowledge, able also to admonish others.
YLT - And I am persuaded, my brethren -- I myself also -- concerning you, that ye yourselves also are full of goodness, having been filled with all knowledge, able also one another to admonish;