Rabindranath Tagore 
Sadhana, The Realisation of Life [EPUB ebook] 

First published in 1916, 'Sadhana, The Realisation of Life’ is a collection of essays, most of which he gave before the Harvard University, describing Indian beliefs, philosophy and culture from different viewpoints, often making comparison with Western thought and culture.
A repository of the timeless wisdom of the East,  ’Sadhana, The Realisation of Life’ is one of the most profound books on spirituality that you will ever read,  a breath taking collection of spiritual discourses.
Compiled and translated by Tagore from his Bengali lectures, the book consists of eight essays, in which Tagore answers some of the most profound questions of life: Why did God create this world? Why would a Perfect Being, instead of remaining eternally concentrated in Himself, go through the trouble of manifesting the Universe? Why does evil exist? Do love and beauty have a purpose?
Rabindranath Tagore was a Bengali poet, philosopher, visual artist, playwright, composer, and novelist whose work reshaped Bengali literature and music in the late 19th and early 20th centuries. He became Asia’s first Nobel laureate when he won the 1913 Nobel Prize in Literature.