Your moniker says it all:
speaking to others about Jesus or the Kingdom is for the benefit of both the speaker and the hearer. The speaker have their qualities of faith, hope and love increased, while the hearer is introduced to the life saving message about Christ, or a reinforcement of a message already received. It’s a win, win even if the person you speak to does not listen. It may just soften their hearts up for the next time. Or, they may never have faith strong enough to endure the hour of test, but maybe your kindness in witnessing to them will strengthen their sense of Love and they will show that love to one of Christ’s belongings during the test of the mark. Either way, your expressions cannot do any harm and may do some good.