first, though, i shall describe jesus and mary magdalene so you can imagine them as i speak about them. jesus was outgoing, not as vivacious as mary but always pleasant of temperament.

How would the previous sentence be correctly capitalized?
Answer: First, though, I shall describe Jesus and Mary Magdalene so you can imagine them as I speak about them. Jesus was outgoing, not as vivacious as Mary but always pleasant of temperament.
one can therefore assume that his classmates may have had other interests than him.

How would the previous sentence be correctly capitalized?
Answer: One can therefore assume that his classmates may have had other interests than him.
according to this theory, autism is a result of the effect of certain peptides (protein fragments) on the neurotransmission (nervous regulation) in the cns (central nervous system).

How would the previous sentence be correctly capitalized?
Answer: According to this theory, autism is a result of the effect of certain peptides (protein fragments) on the neurotransmission (nervous regulation) in the CNS (central nervous system).
if you want to know in advance what turns me off: impolite people!

How would the previous sentence be correctly capitalized?
Answer: If you want to know in advance what turns me off: impolite people!