The past is already gone, the future is not yet here. There's only one moment for you to live, and that is the present moment
If you want to know the past, look at your present. If you want to know the future, look at your present.
Within this moment, the only moment that exists, the past, present and future are contained.
The secret of health for both mind and body is not to mourn for the past, nor to worry about the future, but to live the present moment wisely and earnestly. There are only two mistakes one can make along the road to truth; not going all the way, and not starting.
Believe nothing on the faith of traditions, even though they have been held in honor for many generations and in diverse places. Do not believe a thing because many people speak of it. Do not believe on the faith of the sages of the past. Do not believe what you yourself have imagined, persuading yourself that a God inspires you. Believe nothing on the sole authority of your masters and priests. After examination, believe what you yourself have tested and found to be reasonable, and conform your conduct thereto.
Just as a snake sheds its skin, we must shed our past over and over again.
If you want to understand the causes that existed in the past, look at the results as they are manifested in the present. And if you want to understand what results will be manifested in the future, look at the causes that exist in the present.
All beings are not only the parents in the past. They will become the Buddha in the future. If you free their lives, you are Buddha.
Do not pursue the past. Do not lose yourself in the future. The past no longer is. The future has not yet come. Looking deeply at life as it is. In the very here and now, the practitioner dwells in stability and freedom. We must be diligent today. To wait until tomorrow is too late. Death comes unexpectedly. How can we bargain with it? The sage calls a person who knows how to dwell in mindfulness night and day, 'one who knows the better way to live alone.'
To insist on a spiritual practice that served you in the past is to carry the raft on your back after you have crossed the river.
So too, monks, I saw the ancient path, the ancient road traveled by the Perfectly Enlightened Ones of the past. And what is that ancient path, that ancient road? It is just this Noble Eightfold Path; that is, right view, right intention, right speech, right action, right livelihood, right effort, right mindfulness, right concentration.
Any material form, or thought, or feeling, past or present, should be regarded as, 'This is not mine, this is not what I am, this is not my self.'
Let go the past, let go the future, and let go the present (front, back, middle). Crossing to the farther shore of existence, with mind released everywhere, do not further undergo birth and decay.