bhāra-haraṇa-kāla tāte ha-ila miśāla
kintu-but; kṛṣṇera-of Lord Kṛṣṇa; yei-that which; haya-is; avatāra-of incarnation; kāla-the time; bhāra-haraṇa-of taking away the burden; kāla-the time; tāte-in that; ha-ila-there was; miśāla-mixture.
But the time to lift the burden of the world mixed with the time for Lord Kṛṣṇa's incarnation.
We have information from the Bhagavad-gītā that the Lord appears at particular intervals to adjust a time-worn spiritual culture. Lord Śrī Kṛṣṇa appeared at the end of Dvāpara-yuga to regenerate the spiritual culture of human society and also to manifest His transcendental pastimes. Viṣṇu is the authorized Lord who maintains the created cosmos, and He is also the principal Deity who makes adjustments for improper administration in the cosmic creation. Śrī Kṛṣṇa is the primeval Lord, and He appears not to make such administrative adjustments but only to exhibit His transcendental pastimes and thus attract the fallen souls back home, back to Godhead.