Isaiah 50 is a part of a big book called the Bible. It's a story about God and how much he loves us. The part you're asking about is all about a person named Isaiah who was a prophet a long, long time ago.
In this part of the story, Isaiah is talking about how he knows that God is with him and helping him. He says that even when people are mean to him and hurt him, he's not afraid because he knows God is with him. He trusts God to help him and keep him safe.
Isaiah also talks about how he listens to God and does what he says. He says that God has given him the words to speak, and he's happy to speak them even if it's hard sometimes. Isaiah believes that everything he does is because God is guiding him.
Overall, Isaiah 50 is a story about how much we can trust God to help us, even when things are tough. It shows us that if we listen to him and follow his words, we can do great things, just like Isaiah did.