“The universe is conspicuously well organized for human existence and has all the necessary and narrowly defined characteristics to make man and his sustained survival possible. It would take a book to explain all these parameters, so I will list just a few that demonstrate the point.
If the “strong nuclear forces” that hold protons and neutrons together were 2 percent weaker, only hydrogen would exist, and nothing like the universe we know would be possible. And if they were 0.3 percent stronger, hydrogen would be rare and life would be impossible.
The neutron is 0.138 percent more massive than the proton, and at creation seven times more protons were created than neutrons. If neutrons were 0.1 percent more massive, so few neutrons would have emerged from the big bang that life would not have been possible. If neutrons were 0.1 percent less massive, the universe would have collapsed into neutron stars or black holes — and again, life would have been impossible. Nobody knows why neutrons are larger — except that this is necessary to allow the universe to exist and support life.
Unless the number of electrons in the universe is equivalent to the number of protons to an accuracy of one part in 10^37 or better, electromagnetic forces would have overcome gravitational forces, and so stars and galaxies would have never formed. With that many dimes — ten to the thirty-seventh power — you could cover North America, with the dimes stacked to the moon, and do this a billion more times. If you colored one dime red and blindfolded yourself, your chance of picking it out would be 1 in 10^37!
The expansion rate of the universe determines what kinds of stars, if any, are able to form. If the rate of expansion were slightly less, the whole universe would have collapsed before any sun-type stars could have settled into stability. If the universe were expanding slightly more rapidly, no stars or galaxies could condense. According to the theoretical physicist Alan Guth, this expansion rate must be fine-tuned to an accuracy of one part in 10^55. As massive as that number is, the gravitational constant must be fine-tuned to one part in 10^60, and dark energy density to one part in 10^120. To get an idea of just how large these numbers are: The number of cells in the human body is roughly 10^14, and the number of seconds since time began 13.8 billion years ago is only 10^20!”
Summa Catechetica, "Neque enim quaero intelligere ut credam, sed credo ut intelligam." – St Anselm, "Let your religion be less of a theory, and more of a love affair." -G.K. Chesterton, "I want a laity, not arrogant, not rash in speech, not disputatious, but men and women who know their religion, who enter into it, who know just where they stand, who know what they hold and what they do not, and who know their creed so well that they can give an account of it."- Bl John Henry Newman, Cong. Orat., "Encounter, not confrontation; attraction, not promotion; dialogue, not debate." -cf Pope Francis, “You will not see anyone who is really striving after his advancement who is not given to spiritual reading. And as to him who neglects it, the fact will soon be observed by his progress.” -St Athanasius, "To convert someone, go and take them by the hand and guide them." -St Thomas Aquinas, OP. 1 saint ruins ALL the cynicism in Hell & on Earth. “When we pray we talk to God; when we read God talks to us…All spiritual growth comes from reading and reflection.” -St Isidore of Seville, “Also in some meditations today I earnestly asked our Lord to watch over my compositions that they might do me no harm through the enmity or imprudence of any man or my own; that He would have them as His own and employ or not employ them as He should see fit. And this I believe is heard.” -GM Hopkins, SJ, "Only God knows the good that can come about by reading one good Catholic book." — St. John Bosco, "Why don't you try explaining it to them?" – cf St Peter Canisius, SJ, Doctor of the Church, Doctor of the Catechism, "Already I was coming to appreciate that often apologetics consists of offering theological eye glasses of varying prescriptions to an inquirer. Only one prescription will give him clear sight; all the others will give him at best indistinct sight. What you want him to see—some particular truth of the Faith—will remain fuzzy to him until you come across theological eye glasses that precisely compensate for his particular defect of vision." -Karl Keating, "The more perfectly we know God, the more perfectly we love Him." -St Thomas Aquinas, OP, ST, I-II,67,6 ad 3, “But always when I was without a book, my soul would at once become disturbed, and my thoughts wandered." —St. Teresa of Avila