Never consider whether or not you are of use— but always consider that “you are not your own” (1 Corinthians 6:19). You are His.
What do I count in my life as “dear to myself”? If I have not been seized by Jesus Christ and have not surrendered myself to Him, I will consider the time I decide to give God and my own ideas of service as dear. I will also consider my own life as “dear to myself."