Part

 1 Pre|         discovered, in the third, certain of the rules of Morals which
 2 I  |      early in life fallen in with certain tracks which have conducted
 3 I  |         by their help a clear and certain knowledge of all that is
 4 II |      there have been at all times certain officers whose duty it was
 5 II |     legislator. ~It is thus quite certain that the constitution of
 6 II |       custom and example than any certain knowledge. ~And, finally,
 7 II |          complete a subjection to certain rules and formulas, that
 8 II |            assigning in thought a certain order even to those objects
 9 II |      demonstrations, that is, any certain and evident reasons, I did
10 II |          I should express them by certain characters the briefest
11 II |          in which I found nothing certain, I thought it necessary
12 III|           if they had been highly certain; imitating in this the example
13 III|           permissible, it is very certain that, when it is not in
14 III|           but manifestly true and certain, since the reason by which
15 III|         in which I thought myself certain of attaining all the knowledge
16 III|     conjectures, but by clear and certain reasonings, I met with nothing
17 III|        question contained nothing certain. ~And, just as in pulling
18 III|         the establishment of more certain. And further, I continued
19 III| principles of any philosophy more certain than the vulgar. ~And the
20 III|       that by others are esteemed certain, than from my having boasted
21 IV |          COGITO ERGO SUM), was so certain and of such evidence that
22 IV |          so far as it possessed a certain perfection, and, if they
23 IV |           were in me because of a certain imperfection of my nature. ~
24 IV |    consequently it is at least as certain that God, who is this Perfect
25 IV |            in which however it is certain that the ideas of God and
26 IV |           and such like, are less certain; for, although we have a
27 IV |  distinctly conceive are true, is certain only because God is or exists
28 IV |          the soul has rendered us certain of this rule, we can easily
29 V  |       appear to me more clear and certain than the demonstrations
30 V  |          but I have also observed certain laws established in nature
31 V  |   discoveries in a treatise which certain considerations prevent me
32 V  |   observed in our seas, as also a certain current both of water and
33 V  |         it was to be. But this is certain, and an opinion commonly
34 V  |           only he had established certain laws of nature, and had
35 V  |        there must of necessity be certain passages below the ligature,
36 V  |      blood, from the existence of certain pellicles, so disposed in
37 V  |     arteries, and along with this certain of the more fluid parts
38 V  |           of the arteries, causes certain of its parts to remain in
39 V  |      rather than others flow into certain parts, in the same way that
40 V  |       would still remain two most certain tests whereby to know that
41 V  |            without doubt, fail in certain others from which it could
42 V  |           spontaneously inventing certain signs by which they discover
43 V  |      person to speak; and since a certain inequality of capacity is
44 V  |           must it be thought with certain of the ancients, that the
45 V  |          more industry than we in certain of their actions, the same
46 VI |         thoughts, had condemned a certain doctrine in physics, published
47 VI |          which I had not the most certain demonstrations, and not
48 VI |        any other source than from certain germs of truths naturally
49 VI |      myself than by again seeking certain experiments, which may be
50 VI |      aught except in order, it is certain that what yet remains to
51 VI |    majority of these effects most certain, the causes from which I
52 VI |        not to do so, to prevent a certain class of minds from thence
53 VI |        any promise which I am not certain of being able to fulfill;