In plain words
Then Kṛṣṇa, in a fury, got down from the chariot and said, ‘Will you kill Bhīṣma, or do you want me to kill him?’ He did this only to rouse a kind of fire in Arjuna, and for nothing else. In the same way, every act of God has a hidden meaning and reasons behind it. As Kṛṣṇa came down from the chariot saying He would kill him, Bhīṣma described Kṛṣṇa in this way:
As He sprang and leapt, the light of His earrings covered the whole expanse of the sky; as He bounded, the earth, unable to bear it, shook under the weight of the worlds within His belly; as He came rushing on, discus in hand, the yellow cloth upon Him slipped; ‘I trusted You; do not make my strength a mockery, forgive me,’ Arjuna pleaded, holding Him back; flashing like a lion that springs at an elephant, ‘Today I will kill Bhīṣma and save you; let go, Arjuna!’ He cried, and through my rain of arrows the Lord who came rushing on is my refuge.
Even when Kṛṣṇa came to kill him, Bhīṣma was praying, ‘May Kṛṣṇa Himself protect me.’ For he knew that He Himself punishes and He Himself protects. He is the true jñāni, Bhīṣmācārya.
Only one who recognizes his own true nature can recognize divinity
Whoever goes on searching outside even after gaining Ātmajñāna is an ajñāni. The Jīvātma is not one thing and the Paramātma another; they must come to be one Ātma. The one who acts and the one who has it done are not two.