lightness/weight

"Let us sum up. These four forms of attachment are the only problem that Buddhists or people who wish to know about Buddhism have to understand. The objective of living a holy life (Brahmacariya) in Buddhism is to enable the mind to give up unskillful grasping. You can find this teaching in every discourse in the texts which treats of the attainment of arahantship. The expression used is "the mind freed from attachment." That is the ultimate. When the mind is free from attachment, there is nothing to bind it and make it a slave of the world. There is nothing to keep it spinning on in the cycle of birth and death, so the whole process comes to a stop, or rather, becomes world transcending, free from the world. The giving up of unskillful clinging is, then, the key to Buddhist practice."
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“The heaviest of burdens crushes us, we sink beneath it, it pins us to the ground. But in love poetry of every age, the woman longs to be weighed down by the man's body.The heaviest of burdens is therefore simultaneously an image of life's most intense fulfillment. The heavier the burden, the closer our lives come to the earth, the more real and truthful they become. Conversely, the absolute absence of burden causes man to be lighter than air, to soar into heights, take leave of the earth and his earthly being, and become only half real, his movements as free as they are insignificant. What then shall we choose? Weight or lightness?” 
Milan Kundera (The Unbearable Lightness of Being)