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SB 4.8.21
tatha manur vo bhagavan pitamaho
yam eka-matya puru-daksinair makhaih
istvabhipede duravapam anyato
bhaumam sukham divyam athapavargyam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Suniti informed her son: Your grandfather Svayambhuva Manu executed great sacrifices with distribution of charity, and thereby, with unflinching faith and devotion, he worshiped and satisfied the Supreme Personality of Godhead. By acting in that way, he achieved the greatest success in material happiness and afterwards achieved liberation, which is impossible to obtain by worshiping the demigods.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The success of one’s life is measured by one’s material happiness in this life and liberation in the next. Such success can be achieved only by the grace of the Supreme Personality of Godhead. The words eka-matya mean concentrating one’s mind on the Lord without deviation. This process of undeviating worship of the Supreme Lord is also expressed in Bhagavad-gita as ananya-bhak. “That which is impossible to obtain from any other source” is also mentioned here. “Other source” refers to worship of the demigods. It is especially stressed here that the opulence of Manu was due to his undeviating faithfulness in the transcendental service of the Lord. One who diverts his mind to worshiping many demigods to obtain material happiness is considered bereft of intelligence. If anyone wants even material happiness, he can worship the Supreme Lord without deviation, and persons who are desirous of liberation can also worship the Supreme Lord and achieve their goal of life.