They came to Jericho. As he and his disciples and a large crowd were leaving Jericho, Bartimaeus son of Timaeus, a blind beggar, was sitting by the roadside. When he heard that it was Jesus of Nazareth, he began to shout out and say, “Jesus, Son of David, have mercy on me!” Many sternly ordered him to be quiet, but he cried out even more loudly, “Son of David, have mercy on me!” Jesus stood still and said, “Call him here.” And they called the blind man, saying to him, “Take heart; get up, he is calling you.” So throwing off his cloak, he sprang up and came to Jesus. Then Jesus said to him, “What do you want me to do for you?” The blind man said to him, “My teacher, let me see again.” Jesus said to him, “Go; your faith has made you well.” Immediately he regained his sight and followed him on the way. (Mark 10:46-52, NRSV)
This man knew Jesus could give him his sight.
And so he shouted for Jesus to heal him.
He shouted for Jesus to have mercy on him.
Even when others told him to stop or be quiet, he continued. He got louder.
He knew Jesus could and would heal him.
He persisted until he could see.
Be persistent, and call on God to help you.