Matthew 10:19-20 (New King James Version)
19 But when they deliver you up, do not worry about how or what you should speak. For it will be given to you in that hour what you should speak; 20 for it is not you who speak, but the Spirit of your Father who speaks in you.
This is encouraging to hear and I’m sure the disciples were relieved at hearing this also. Something that i have always struggled with is talking to strangers about the love of Jesus and how He could change their lives. This verse speaks to me in that manner. When presented with an opportunity i just need to open my mouth and let God do the rest. I am always afraid that i will contradict myself from a lack of knowledge in the Word, or that i will stutter like a 7 year old. “The words of the Lord are pure words, like silver tried in a furnace of earth purified seven times” (Psalm 12:6).
God this is my prayer: speak through me constantly and guide my tongue, especially where, when, and with whom you see fit. Please take away my nervousness to share your love, help me to make it a larger part of my life that i may talk about it more freely. God my words alone are nothing compared to yours, please help me to rely on your spirit. Amen.
Aaron Aiken 
That’s great that you’re beliving God to step-out in faith to talk to strangers. Let God use you even more.