Make sure that what you are doing and striving for is going to be worth any sacrifices you will have to make along the way. If it's a relationship, job, anything in life.
If you love someone more than life itself and will do anything to have her and shes perfect for you, yet you have to move far away and start a new life, the juice is worth the squeeze.
Or if you want to become a lawyer but it costs 100's of thousands in debt and years of studying and when you graduate you have to move to alaska but your starting salary is 400K a year, the juice was worth the squeeze. Always know if the juice is worth the squeeze.
Their is no clear definition what the jucie is, because the juice is what ever you make it, it can be anything nobody can define what it is for you, you know what the juice is.
ex: For me like sometimes I think the juice is when I win I pop off I go ahh monkey rage "poo mald pow" thats my juice, but maybe your juice is when you do a nice piece of art like Picasso and you go like who likes my art "hell yeah pog" that maybe your juice. Maybe you like money and buying shit thats your "juice".