I cannot aford it of what is too hard to contenue

A person usually says that to mean that they are under some pressure, and that it is difficult to continue what they are doing-- if they are up late having to work, they might say, "I will never last until morning." You can think of that to mean that it is stressing them out!

It usually means "I can't do (something) or finish something. For example, a party is going to carry on until the early hours of the morning. "I'll never last until 4am, I'm tired already and it's only 10pm!"