Divine Power of Semen
All energy and power in the seen and unseen universe stems from the Lord alone. It is this energy alone that can create and help things grow, whether in the material or spiritual world. Veerya (Semen) is the representation of this divine force in gross form. The power and ability that an established Brahmachari(celibate) carries cannot be described. It is a power that transcends the body, mind, and psyche. It is the power of the very Lord himself. Even his Sankalpas (wishes) bear great strength when focused rightly. Hence, one should not lose the creative fluid (Semen) at any cost.
Sage Patanjali states the effect of unbroken continence in the 'Yoga Darshana' Chapter II, Verse 38:
"Upon establishment in Brahmacharya comes the gain of Veerya."
The word Veerya (Semen) here refers to a multitude of qualities that include valor, bravery, strength, persistence, tenacity, efficacy, grit, determination, and many other related qualities. In other words, Veerya (Semen) represents the net sum of all energy that a man makes use of to succeed in any given task. Hence, its gain portends success, and its loss eventually leads to failure. This is the truth.