After briefly and cojncisely summarizing principla ideals of classical Yoga philosophy, the paper is primarily concerned with outlining the issue of theism within its frame. Related sūtras are treated where definition of Īśvara, the ssupreme Being and highest spiritual monad, is presented and referred to. These are followed by some considerations over that peculiar concept of God. Conclusion is drawn and argued for that the notion of Īśvara (who cannot be thought of as a personal god) is of philosophical rather than religious character. Not being in any sense creator of the universe nor enjoying any sort of cult or religious practice and remaining in his eternal inertness and perfection, Īśvara could be best seen as a God of the yogīs, whose only aim, so to speak, is to serve as a perfect model for a libertaion-seeking person. It is his very existence thet urges yogī to achieve self-realization by means of concentration., Ján Országh., and Obsahuje seznam literatury