I am not supposed to be useless to God. After I realized what I had been doing with my quiet time and my studying yesterday, I thought that I must be useless to Him. But then He led me to read about John the Baptist and started talking to me again about witnessing.
I've been having problems with condemnation lately, and I've been praying about it. Yesterday, it seems, God dealt with the condemnation for me. Messing up doesn't make me useless. If it did, God would have lost all His servants a long time ago. So it's not right for me to hang on to the condemnation.