Time is not linear, we only believe it is. We believe it is because that is what we were taught. We were taught that time is linear since it is the current theory in the timeframe in which we currently appear. Our minds are very powerful and create our reality, we see what we believe. We see time as linear because we believe it to be so. When the mind gives up the belief that time is linear and the mind decides to observe time as an unbiased observer, time will start to present itself to the mind in its true nature. In other words, the mind will stop trying to make time what it wants it to be, which is linear, instead of what it truly is.
Time is total, circular, and non-linear. The mind is capable of seeing "past" "present" and "future" simultaneously. For example, as I am writing this, I am experiencing it as something that I am currently doing in the "present". I am also equally experiencing myself writing this as a "past" memory. I am also equally experiencing myself seeing myself writing this in the "future". The most recent "past", "present", and "future" thoughts are fresher in the mind when viewed from a linear belief. After letting go of the belief that time is linear, the mind is able to see all of time at once without any separation of a linear perspective.
The thoughts of the mind create the "past", the "present", and the "future". The mind makes connections. The mind wants to see time as linear, so the mind gathers "evidence" to show that its belief that "time is linear" is true. The mind tries very hard to believe what it was told to believe even if it isn't true. The bodies need for a social community drives the minds need to accept the beliefs of fellow community members. Since the mind believes that time is linear the mind also believes that the "future" can be determined by gathering data from the "past". The mind gets frustrated because it can never determine the future from the past. The harder the mind clings to the belief that it was told that time is linear, the harder the mind tries to control it, and the more distressed the mind becomes.
The mind starts panicking because it doesn't understand why linear time just doesn't make any sense while believing it to be true simply because everyone else said it was. What if everyone is wrong? All we have is theories. Theories are the minds way of questioning the beliefs and reaching beyond what was previously imagined possible. Everything that we know now is due to countless individual minds pushing beyond what it was told to believe. The mind is capable of knowing what is going to happen in the "future" when it stops trying to predict it. The mind is capable of changing the "past" when is stops seeing it as something that cannot be changed. The mind is cable of seeing the "present" which is simply a mixture of the "past" and the "future" coming together to form the "present".
A mind free from belief is an open mind. A mind that doesn't hold onto any one belief is able to free itself from thought. The mind is able to become an unbiased, impartial observer or witness. Peace and Love!