It is very possible for someone to be a truly good person and yet be completely unknown. Always remember this. Also remember that real happiness comes from very few things. Even if you give up hope of ever being a good logician or scientist, you are no further away from being generous, humble, kind, or devoted to God.
For it is a thing very possible, that a man should be a very divine man, and yet be altogether unknown. This thou must ever be mindful of, as of this also, that a man's true happiness doth consist in very few things. And that although thou dost despair, that thou shalt ever be a good either logician, or naturalist, yet thou art never the further off by it from being either liberal, or modest, or charitable, or obedient unto God.