We are to walk in love because our Father is Love.

The Amplified Bible helps us see what it really means to walk in the God-kind of love:
Love does not rejoice at injustice and unrighteousness,
Love rejoices when right and truth prevail,
Love bears up under anything and everything that comes,
Love is ever ready to believe the best of everyone,
Love's hopes are fadeless under all circumstances,
Love endures everything without weakening,
Love never fails, never fades out or comes to an end.