Verb
reflect upon (third-person singular simple present reflects upon, present participle reflecting upon, simple past and past participle reflected upon)
To consider a weighty topic or idea.
We cannot observe external things without some degree of Thought; nor can we reflect upon our Thoughts, without being influenced in the course of our reflection by the Things which we have observed. William Whewell
Reflect upon your present blessings of which every man has many - not on your past misfortunes, of which all men have some. Charles Dickens
Noting all these things with the great delight which learning gives, we cannot but be stirred by these discoveries when we reflect upon the influence of them one by one. Vitruvius
It is enough for me to contemplate the mystery of conscious life perpetuating itself through all eternity, to reflect upon the marvelous structure of the universe which we dimly perceive, and to try humbly to comprehend an infinitesimal part of the intelligence manifested in nature. Albert Einstein
We are victims of our own success. We have let technology lead the way, pushing ever faster to newer, faster, and more powerful systems, with nary a moment to rest, contemplate, and to reflect upon why, how, and for whom all this energy has been expended. Donald Norman
That soul that can reflect upon itself, consider itself, is more than so. John Donne