The human intellect has not been able to conceive of anything more noble and sublime in the history of the world than the teachings of the Upanishads.
SivanandaYour sole purpose in life is to attain God-realization. All else is useless and worthless.
SivanandaAlways do good to others. Be selfless. Mentally remove everything and be free. This is divine life. This is the direct way to Moksha or salvation.
SivanandaHow will you get God's grace? When you discipline yourself. How will you know how to discipline? By observing others that had walked the path successfully to the goal of perfection. Who are these men who had walked to the goal? It is these that are known as Gurus. So you need their help, their personal example, their encouragement and their grace. Thus, we have come round to the answer that a Guru is necessary as well as his grace. Everything is necessary-\-\ Atma Kripa, Guru Kripa and Isvara Kripa.
Sivananda