What we do not know does not define the absence or presence of anything.
Just because we do not see the sun shining bright, we cannot conclude the sun is dark at night. But often our understanding gets limited by what we perceive, as we as a default limit our understanding to what we see, what we hear. Some of us even after having grown up through school and college, do not choose to re-write the understanding of our mind that the sun shines 24×7 !

In a day and age in which quick solutions are popular, we recall how our parents persevered in bringing us up. Often they were so certain about the goodness in us, they made it plain that we could do it much better. When we had self-doubt about our ability, they were so certain that when we tried longer, when we tried more often, the results would be so different. Often it seemed that they knew for certain what could become of us, they did not have any doubt. They preserved in all certainty. We did not realise it then, but we realise it now.