Bhagavad Gita 7.19 · Bahunam Janmanam Anteबहूनां जन्मनामन्ते ज्ञानवान्मां प्रपद्यते।वासुदेवः सर्वमिति स महात्मा सुदुर्लभः ॥

Vaasudeva is a name of Lord Krishna as He is the son of Vasudeva. He is the allpervading Brahman.The aspirant gradually evolves through Yogic practices, selfless service, devotion and constant meditation in many births and ultimately attains the inner Self. He realises that all is Vaasudeva. It is very difficult to find such a great soul, who has attained to perfection. No one is eal to him. That is the reason why the Lord has said, One in a thousand perchance strives for perfection even among those successful strivers, only one perchance knows Me in essence. (Cf.VII.3.)