He looked at Jesus, suffering just as much as he was, and he recognized that Jesus was innocent. And Jesus said unto him. The thief was dying. He acknowledged Him as Lord, and believed on Him. It is only human to want assurance of love.
Sweethearts send millions of valentines each year to assure each other of undying love.
This one verse is enough assurance for us that Christ will keep us safe in His love. When we compromise with sin doubt comes in to destroy our peace of mind. On the outside, I have put some hooks you can hang on to. If you can cling to them for a certain number of days, you will be saved from the flood. He told Noah and his family to enter into the ark.