Self-occupation is a great mistake for the Christian. Of course, until a sinner has learned the plague of his own soul, he must be turned in upon himself. Thus he will cry, "God be merciful to me a sinner," and find salvation and peace in turning to God. So too a Christian must be reminded of himself as long as he thinks there is anything good in him. But when he can say with Paul, "I know that in me, that is, in my flesh, dwelleth no good thing," he is privileged to turn from himself to Christ, to find his all in Him.
And what a relief it is! Instead of thinking about my feelings, my attainments, my work, my dignity—to live in the joy of the Lord, in what He is for us, in letting Him work in us that which is well pleasing in His sight, in the desire that He may be glorified. This is what is meant by the words, "To me to live is Christ"; living is Christ.
Are you thinking of yourself? Then you are in danger of being a Pharisee or being miserable: Do you long to be happy, or holy? Turn to Jesus the Author and Finisher of faith; find your all in Him.