If you need wisdom, ask our generous God, and he will give it to you. He will not rebuke you for asking. (James 1:5 NLT)
There are different understandings of the meaning of wisdom. Some say it is knowing what to do with the information/knowledge you have. Others think of it as something you gain with time and experience that helps you make good judgements. Those are probably both true.
But this passage shows wisdom as something God possesses and can grant to his children. In its context, this verse speaks of wisdom that helps you endure trials.
I often think of wisdom as seeing things from God’s perspective, which allows us to live as God would have us live. It gives us the skill, the ability, to live in a way we would otherwise not. Obviously we will never have the full benefit of the perspective of an omniscient, omnipresent God, but I think he gives us a peek. When we see things as he sees them (even though incomplete and imperfect), we are able to make decisions that bring him glory. We are able to endure troubles and trials that would seem harsh and unfair otherwise.
But God sees it all–from beginning to end–and he knows what we need and what we can endure and what will make us more like Jesus. He knows what will bring him glory. He knows what will draw men to himself. He never wastes anything. His is love infinite and even in allowing you to walk through trials it is in supreme love.
So if you are going through a particularly difficult season, ask God for wisdom. You will see your trials from a kingdom perspective and you will begin to understand how it is possible to count it all joy! God will give you the wisdom to endure.