If men were able to exercise complete control over all their circumstances, or if continuous good fortune were always their lot, they would never be prey to superstition. But since they are often reduced to such straits as to be without any resources, and their immoderate greed for fortune's fickle favours often makes then the wretched victims of alternating hopes and fears, the result is that, for the most part, their credulity knows no bounds. In critical times they are swayed this way or that by the slightest impulse, especially so when they are wavering between the emotions of hope and fear; yet at other times they are overconfident, boastful and arrogant.
No one can be unaware of these truths, even though I believe that men generally know not their own selves. For no one can have lived in this world without realising that, when fortune smiles at them, the majority of men, even in quite unversed in affairs, are so abounding in wisdom that any advice offered to them is regarded as an affront, whereas in adversity they know not where to turn, begging for advice from any quarter; and then there is no counsel so foolish, absurd or vain which they will not follow. Again, even the most trivial of causes are enough to raise their hopes or dash them to the ground. For if, while possessed by fear, they see something happen that calls to mind something good or bad in the past, they believe that this portends a happy or unhappy issue, and this they therefore call a lucky or unlucky omen, even though it may fail them a hundred times.
Spinoza, Baruch. Theological-Political Treatise
Spinoza, Baruch. Theological-Political Treatise