Consider our youngsters; they do not have a care in creation as they live for the moment. I question why we don't learn from youngsters instead of going between past tense and future tense.
Recognizing that the past is defunct can't be rewound and the time to come is yet to come along.
Human beings by nature feel comfortable and unquestioned in memorizing past and designing future.
May we ever augur precisely what will occur in the next minute? Yet our brain never stops supposing and planning future illusions.
Some one has justifiably stated, 'Are we only worried with adding days to our life, and forgetting to add life to our days"?