सद्भावे साधुभावे च सदित्येतत्प्रयुज्यते।प्रशस्ते कर्मणि तथा सच्छब्दः पार्थ युज्यते ॥

Satbhava That which is unchanging amidst the changing, that which is permanent amidst the impermanent, that which exists in the past, present and future is Sat the reality behind the everchanging names and forms is Sat the substratum in which the everchanging forms inhere is Sat. Meritorious action is Sat.Sadhubhava An attribute of harmony with nature, so that the worlds cycle moves smoothly.The word Sat is powerful enough to make a defective action perfect and complete. When a good action is likely to be rendered Asat or bad owing to a single defect, the use of the word Sat makes it free from defects and brings it to a successful termination. The word Sat removes the evil quality of the action as it has the power of purifying and rendering the act perfect.Sat is Existence Absolute. Sat is Para Brahman. Sat is the inexpressible symbol of that mysterious indescribable, illimitable, indivisible, selfluminous, immortal Brahman.The word Sat is used when you wish to express the reality of an object which is unreal or which is relatively real, as for instance, the birth of a son who is unreal or relatively real in telling that a man is one of good conduct when his conduct is not good or is only relatively good, and in expressing that an act is auspicious, when it is not auspicious or only relatively auspicious.Brahman alone is real. It alone really exists