Lord Krishna is the all-powerful, all-pervading Supreme Personality of Godhead and he is the object of the prayers and worship of the demigods. Intelligent persons worship him as He resides in his own spiritual abode. They thus attain the eternal transcendental bliss that is not available for others.
Although the quality of being self-satisfied is eternally present in Krishna, the quality of enjoying pastimes is also eternally present in him. For the Supreme Lord to possess contradictory characteristics in perfect harmony is natural. In one aspect, Krishna has the quality of self-satisfaction and in another aspect, he manifests his opposite quality of enjoying pastimes with others.
What assurance of real happiness is there in all of one's wealth, youthfulness, sons and family members? This life is tottering like a drop of water on a lotus petal. Therefore you should always serve and worship the lotus feet of Lord Krishna.
The transcendental body of Krishna is very sweet and His face is even sweeter than His body. The soft smile on His face, which is like the fragrance of honey, is sweeter still.
According to our time scale, 4,320,000,000 years constitute only twelve hours of Brahma and Brahma lives one hundred of his years. Yet the whole life of Brahma is contained within one breath of Maha-Visnu. That Maha-Visnu is but a partial manifestation of Krishna.
Since Krishna's form, qualities, pastimes, etc. are all on the absolute platform, material senses cannot appreciate them.