My way of reading that is he is suggesting that you check in with yourself. To see how you are doing. He wants you to be aware of how you are feeling. To be honest with yourself about how you are doing. And then to try and evaluate the truth of how you are feeling. Are your feelings clouding your judgment. I think that is what he is trying to say. Not that you aren't working hard enough. However hard you can work is hard enough.

Please take care of yourself.