The first one is correct. "It is like" the best decision you can ever make.
Saying it that way, is the same as saying that it would be the best decision that you can ever make, but adding more to it. Almost as if soeaking to someone who is overdramatic, and constantly say the word like.
I hope this helps
Question: What is the passage
Answer:
Mindfulness allows one to be completely aware
Explanation:
The activity of mindfulness is from the category of meditation that allows the person to observe their environment and surrounds without thinking about the meaning or definition. It also allows the person to experience the presence without any judgement.
This is useful in everyday life since there are a number of interactions that may be interpreted as different ways by different persons. All these different schools of thought may cause conflict to arise but it the person practices mindfulness, there may be a way to overcome these difficulties.