If, perchance, one should say
If such a thing were possible
If such feelings were ever entertained
If such is the fact, then
If there is a man here
If we accept at all the argument
If we are conscious of
If we find that
If we resign ourselves to facts
If you want to find out what
If you wish the most conclusive proof
In a broader and a larger sense
In a sense, and a very real sense
In answer to this singular theory
In like manner
In order to carry out
In proof of this drift toward
In proportion as
In proportion, then,
In pursuance of these clear and express
In saying all this, I do not forget
In something of a parallel
In such cases
In support of this claim
In support of what I have been saying
In the first place
In the first place, then, I say
In the first place there is
In the last resort
In the light of these things