Every one of the great revolutionists, from Isaiah to Shelley, have been optimists. They have been indignant, not about the badness of existence, but about the slowness of men in realizing its goodness.
It is crucial that we realize the great value of human existence, the opportunity and the potential that our brief lives afford us. It is only as humans that we have the possibility of implementing changes in our lives.
And the more you become aware of the unknown self - if you become aware of it - the more you realize that it is inseparably connected with everything else that is.
With sincerity and earnestness one can realize God through all religions. The Vaishnavas will realize God, and so will the Saktas, the Vedantists, and the Brahmos. The Mussalmans and Christians will realize Him too. All will certainly realize God if they are earnest and sincere.
And the more you become aware of the unknown self - if you become aware of it - the more you realize that it is inseparably connected with everything else that is.