Some mock Christianity by claiming there are 2 different Christian religions because, they claim, Christ & Paul taught different things. --BUT---- there is NO contradiction.
Christ summarizes His religion:
Jesus said unto him,
Thou shalt love the Lord thy God with all thy heart,
and with all thy soul, and with all thy mind.
This is the first and great commandment.
And the second is like unto it,
Thou shalt love thy neighbour as thyself.
Matthew 22:37-39
Paul Agrees:
Love worketh no ill to his neighbour:
therefore love is the fulfilling of the law.
Romans 13:10