Clinging to this life - no practice
The basis for Buddhist practice is one's belief in future lives & karma, therefore if one clings to only THIS LIFE, one will devote all one's energy and time in the improvement on this one life alone and one will not follow any spiritual practice.
Clinging to self - no pure mind
If we look at what qualifies as purity of mind, we will know it's all about focusing on others and free of the 8 worldly comcerns.
Clinging to a standpoint - no right view
If we cling to an assertion without even considering that others might be right, we are just like the over turned pot - nothing can go in, so how to have right view ?
Clinging to existence - no freedom
Liberation /freedom in Buddhist's sense is out of the six realms. If we cling on to existence of any form, we shall never get out of the cyclic rebirth thus no freedom.
I'm just guessing here with my own reasoning, perhaps others will have more logical matchings
. The floor is open !