Psalm 55:22
Cast your cares on the LORD and he will sustain you; he will never let the righteous fall.
And I
will give you a new heart, and a new spirit I will put within you. And I will
remove the heart of stone from your flesh and give you a heart of flesh.
I, by myself, can not be a missionary. By myself I will fail. I will see people and freeze, not knowing what to say or what to do. Only with God can I work to be strong enough. He can nudge me towards a group of people. Only with God can I be the crazy person who smiles at everyone, even stopping to talk to people on the street.
This change can only happen if I give my heart to God and ask Him to make it like His.