How many times have you prayerfully invited your friend, colleague or neighbor to a Gospel programme?  Countless times?
How many times has she/he responded and come to the Gospel meeting? Never did come?  Came only once and then avoids you or speaks ill of you?

Do not worry!  Cheer up! Let us see what happens beneath the covers

The ball starts rolling once a sincere attempt is made to share the Gospel of the Lord Jesus Christ to the needy. The work has begun. Results may not be evident immediately; but the Holy Spirit of God is at work from the inside.

What happens when you use a hammer initially on a rock?It seems to only cause pain in your hand but stays intact.However, as you repeat the hammering, cracks begin to appear and finally the rock is shattered.

Even so, God is at work along with you as you prayerfully reach out to the needy and oppressed.  He will confirm His word with His works.
And they went out and preached everywhere, the Lord working with them and confirming the word through the accompanying signs. Amen. (Mark 16:20)

He does not want anyone to perish. The Lord is not slack concerning His promise, as some count slackness, but is longsuffering toward us, not willing that any should perish but that all should come to repentance. (II Peter 3:9)

So take heart and keep up the good work.  Do not be discouraged.  The rock will be shattered by your consistent attempts in the Holy Ghost!
…let us not grow weary while doing good, for in due season we shall reap if we do not lose heart. (Gal.6:9)

Is not My word like a fire? says the LORD, and like a hammer that breaks the rock in pieces? (Jer.23:29)