"Don't Sit On The Air - Sit On The Chair"
Salvation by self-effort can be likened to a man sitting on the air. Ultimately, he can't do it. His strength will fail and he will sag down by and by as time ticks by the second. Eventually, he will hit the ground.
Salvation by relying upon and trusting in the Savior and what He did on the cross is like sitting restfully on a steady and stable chair.
He knows that self-effort just can't do it. He needs something or someone to rely on. And so, instead of sitting on the air, he sits on the chair.
My friend, the Lord Jesus Christ and what He did on the cross is just like that steady and stable chair. You can rely on Him and His work completely for your salvation.
Don't sit on the air. Sit on the chair!