You won't begin evangelizing until you have more love for the other person than you do for yourself. When there is more self love than love for the other, we will have all kinds of excuses and reasons why we don't want to evangelize the other person.
Stepping out of ourselves to love another is a sign that we have received God's love and have come to be able to pour out the love we have received from God to another person.
How much have I received God's love? Is it just an idea, or has it enetered into my heart.