I am well read on the topic of human development, the fact that working out, with eating healthy, and mediation will improve you as a person. This will improve you in general health, mental health, and make you the most you can be.
Personally speaking, they are 3 things you can do to make you a better person and achieve more. Work on the physical (Working out, eating healthy, and making you are getting enough sleep) the secondly work on yourself mentally (learning, knowledge, mediation, positive affirmations) and the third is work on yourself spiritually many think to do this you have to belong to a religious organization. I personally know there is other ways to connected to the Creator. (mediation is one that can do double duty; law of attraction, prayers, magic, mysticism, shamanism, and finally metaphysics. There is anything wrong with magic,mysticism, shamanism, and finally metaphysics. as long as it used for the better meant of human kind or connecting to the Creator.