[Ascetik]

According to St. Thomas Aquinas, no you cannot, because the immortal soul presupposes a participation in the infinite and eternal. Aristotle made this clear, which St. Thomas then expounds on:

"Man’s ultimate happiness consists in the contemplation of truth, for this operation is specific to man and is shared with no other animals. Also it is not directed to any other end since the contemplation of truth is sought for its own sake. In addition, in this operation man is united to higher beings (substances) since this is the only human operation that is carried out both by God and by the separate substances (angels). (Summa Contra Gentiles, book 3, chapter 37)

and

It is impossible for any created good to constitute man’s happiness. For happiness is that perfect good which entirely satisfies one’s desire; otherwise it would not be the ultimate end, if something yet remained to be desired. Now the object of the will, i.e., of man’s desire, is what is universally good; just as the object of the intellect is what is universally true. Hence it is evident that nothing can satisfy man’s will, except what is universally good. This is to be found, not in any creature, but in God alone, because every creature has only participated goodness. Therefore, God alone can satisfy the will of man, according to the words of the Psalms (102:5): “Who alone satisfies your desire with good things.” Therefore, God alone constitutes man’s happiness.” (Summa Theologica Part 2. Q.1. Article 8)