When we say ‘I was learning this or that in those years’ as a part of our biographies, we treat the learned matter like a dead thing.
And it is a right manner of dealing with our former instruction, even if we mention it as a past experience which shows its fruits in the present time. Because each learned matter was acquired together with the hope in its future use and exactly such a hope disappears once the instruction is now seen as a part of our past.
That hope was instilled in our mind and made all we learned to seem greater than could be in any other time.
If it was a practical instruction from which we are benefiting now, its use in concrete circumstances is far from its primary existence in our minds and thus also far from that initial hope.
If we talk about theoretical matters, our efforts to use them now show clearer that we want to restore to life something we definitely lost in the past. Someone who prides himself on the many theoretical things he knows directs his hopes to the possible admiration who could receive from others. Certainly, it is not that mental hope of learning and the objects of his prides look therefore like a dead stuff used by someone who inherited it from the person who was in the past.
Roughly speaking, the instruction does not really improve our current life. It could do only if puts someone into a state of continual learning and thus to keep alive his mental hopes. But such a state deprives anybody from the human need of considering that he achieved something in his past life.