08812 Infinitive

There are two forms of the infinitive:

1a) Infinitive Construct is used as a verbal noun corresponding
    to the English verbal noun ending in "-ing"

    1a1) as subject
         to keep the judgments
         to seek thy heart

    1a2) as object
         in his "writing"
         he spoke, "saying"

1b) The Infinitive Absolute does not allow prefixes or suffixes

    1b1) Used with a verb  to emphasize the verbal idea. This is often
         rendered by an English adverb, such as, "surely", "utterly".

              he will surely visit you
              he utterly destroyed the people

    1b2) It may be used by itself with the value of a finite form of
         the verb, especially an imperative.

              remember the sabbath day