Any holy book that gives you spiritual motivation is good, but one should not develop ego or pride with one's knowledge of the scriptures. Theoretical knowledge is not enough in daily life. Practical experience is essential.
Self-knowledge (wisdom) is beyond perception of the senses - it can be achieved through deep meditation only.
Perceive all matter as the living soul and enjoy all matter as the living soul. Then your knowledge and consciousness will always remain in cosmic consciousness.
Life is to grow in knowledge, love, and perfection. Be perfect through sincere effort. Rest not until you attain that state of perfection.