... and my eyes and my heart will be... – he mentions eyes and heart, because a person, in his prayer, his eyes should be downwards, towards the soul, which is the Shekhinah, Who is trapped in exile, while his heart should be upwards, to the blessed Holy One.xlivSee BT Yevamot 105b
And the mystery of the matter: (Ps. 25:15) My eyes are always towards Y”Y, for He takes my feet out of the net. And his heart is upwards, to take revenge upon’Amaleq. It is this that is written: (Is. 63:4) For a day of vengeance is in My heart...... in My heart... – specifically. With it He is destined to take revenge, as He took revenge upon Egypt.