It is upon this line of reasoning

It is very common to confuse

It is very doubtful whether

It is very interesting and pleasant

It is well known

It is with great pleasure

It is with pity unspeakable

It is within the memory of men now living

It is worth while to notice

It may appear absurd

It may at first sight seem strange

It may be added

It may be conjectured

It may be imagined

It may be plausibly objected

It may be rightly said

It may be useful to trace

It may be worth your while to keep in view

It may indeed be unavoidable

It may not be altogether certain

It may not be uninteresting to any of you

It may or may not be true

It may, perhaps, seem wonderful

It may seem a little strange

It may still more probably be said

It must be a cause of delight

It must be borne in mind

It must be the verdict of history

It must create astonishment

It must doubtless be admitted

It must ever be recollected

It must never be forgotten

It must not be supposed

It must seem to every thoughtful man

It needs scarcely be said

It now becomes my pride and privilege

It only remains now to speak

It ought to animate us

It proves a great deal

It remains only to speak briefly

It remains that I inform you of

It remains that I should say a few words

It reminds me of an anecdote

It reminds one of the compliment

It requires no effort of imagination

It scarcely seems to be in keeping

It seems almost desperate to think of

It seems almost incredible

It seems now to be generally admitted

It seems strange to be told

It seems then that on the whole

It seems to me a striking circumstance

It seems to me idle to ask

It seems to me singularly appropriate

It seems to me the primary foundation

It seems to me unphilosophical

It should always be borne in mind

It should be remembered

It so happens

It sometimes seems to me

It still remains to be observed

It strikes me with wonder

It suggests at the outset

It summons our imagination

It surely is not too much to expect

It therefore astonishes me

It used to be a reproach

It was a brilliant answer

It was a fine and delicate rebuke

It was a fit and beautiful circumstance

It was a propitious circumstance [propitious = auspicious, favorable]