Vito, having no other suitable blood Corleone to succeed him, had Michael under his tutelage [with “Vito's guidance and counsel”] and that's why it took longer than a year for him to get around to seeking Kay and settling for her

Extract: Vito was instrumental, contributed and caused, among others -

Michael's misery

• Vito planned all the dirty work - killing of Carlo Rizzi [for Michael to make his daughter a widow] and Moe Greene, the baptism murders - for Michael to carry out after Vito's death thus leaving a murderous legacy for "I never wanted this for you" son
• Vito "knew that he could never be "legitimate" in their world, but he hoped for that in Michael: Senator Corleone, Governor Corleone - thus placing the impossible, unrealistic burden - and Vito's "goal" for Michael - of the "obsession" on Michael "the source of his lifelong frustration:"

Thanks! Pop indeed