Logically, If you churn yogurt or milk, then only you can make butter.
When a devotee says to us, “There is no ingredient in the water by which you will get butter. All your efforts are a waste of time.”
We answer, “No, you have lost your mind. I shall go on churning for thousands of births!” ( We think that by churning water, we shall get butter.)
Likewise, this world is devoid of existence, devoid of knowledge and devoid of happiness. If you devote all your energy to this world, you keep on churning, you will not get rather you will be in want of eternal existence, in want of eternal knowledge and in want of eternal happiness.
Sri Krishna is the embodiment of All-Existence, All-Knowledge and All-Bliss.
Therefore, to get eternal existence, eternal knowledge and eternal happiness, we should worship Sri Krishna.
In the Gita, Sri Krishna says:
anityam asukham lokam
imam prapya bhajasva mam
“You have forgotten Me and thus you have come to this non-eternal world.”
So start worshipping Him.
— His Divine Grace Srila Bhakti Ballabh Tirtha Goswami Maharaj