Destiny is a title of Divine Knowledge, it is not something that annuls man's free will and forces him to behave in a pre-ordained way. Since God knows beforehand how man will behave in the world, He has an angel to pre-record his life history. Man behaves according to the dictates of his free will, not because God pre-recorded his future life.
Scientists restrict the concept of life to the conditions that obtain on or beneath Earth’s outer surface. Therefore, when they look for extraterrestrial life, they look for conditions that are the same as or closely correspond to the conditions for life on Earth. If they had retained a sufficient sense of the absolute wonder of life (an aspect of life’s being a direct manifestation of the Ever-Living), they should not have ruled out forms and conditions of life currently beyond their understanding. In their view, the arguments put forward by Said Nursi for the existence of angels and other spirit beings may not be worthy of consideration. However, the latest discoveries in deep-sea biology may persuade them to review his arguments.
It is worth reflecting upon the historical fact that, since the very beginning of human life, the overwhelming majority of humanity has believed in God's existence. This alone is enough to establish God's existence. Unbelievers cannot claim intellectual superiority over believers, for the latter contain many innovative scientists, scholars, researchers and, most importantly, saints and Prophets (the experts in this field). Also, people usually confuse the non-acceptance of something's existence with the acceptance of its non-existence. While the former is only a negation or a rejection, the latter is a judgment needing proof. No one has ever proven, and cannot prove, God's non-existence. In contrast, countless arguments prove His existence.