I never cease to be amazed at the Words He puts in my mouth. When you have the opportunity to share the Word, the Gospel - first, pray to the Holy Spirit to work through you - ask Him to put the words in your mouth. You will be amazed at how He can provide you with exactly the right words at the right time.
Matthew 10:19b-20
. . . do not worry about what to say or how to say it. At that time you will be given what to say, for it will not be you speaking, but the Spirit of your Father speaking through you.