What is an adept?

[Nía]

My other question is, if one sacrifice himself for world peace but loses his life in just praying and meditating, but not helping others physically, will that be enough also?

[A]s the seeker of truth, which we are calling the adept, proceeds further and further along its path, it will discover that those qualities of the outer world which at one time were happy experiences, no longer have attraction. The world and all its lures falls away, and the inner world only is that of importance to such a seeker, for only within the seeking of truth by meditation, by contemplation, by prayer, by fasting, by giving oneself completely to the will of the Creator, can the true seeker achieve this goal of union with the One Creator.

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