I have often endeavoured to view the circulation of the blood in terrestrial animals, but without success, by reason that no parts of their bodies were sufficiently transparent.
ANTONIE VAN LEEUWENHOEK
And therewithal, whenever I found out anything remarkable, I have thought it my duty to put down my discovery on paper, so that all ingenious people might be informed thereof.
![Antonie van Leeuwenhoek Quote - I’ve spent more time than many will believe [making microscopic observations], but I’ve done them with joy, and I’ve taken no notice those who have said why take so much trouble and what good is it?](https://minimalistquotes.com/wp-content/uploads/2022/09/ive-spent-more-time-than-many-will-believe-making--683x1024.jpg)
![Antonie van Leeuwenhoek Quote - The 4th sort of creatures… which moved through the 3 former sorts, were incredibly small, and so small in my eye that I judged, that if 100 of them lay [stretched out] one by another, they would not equal the length of a grain of course Sand; and according to this estimate.](https://minimalistquotes.com/wp-content/uploads/2022/09/the-4th-sort-of-creatures-which-moved-through-the--683x1024.jpg)
![Antonie van Leeuwenhoek Quote - I’ve spent more time than many will believe [making microscopic observations], but I’ve done them with joy, and I’ve taken no notice those who have said why take so much trouble and what good is it?](https://minimalistquotes.com/wp-content/uploads/2021/10/ive-spent-more-time-than-many-will-believe-making--683x1024.jpg)
