Winston Churchill gave a famous commencement speech: “Never give up. Never give up. Never give up.”
Jesus told us that also: Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you. (Matthew 7:7)
The verb tenses are present, active, imperatives. So what Jesus said was:
Keep on asking.
Keep on seeking.
Keep on knocking.
Never give up.