In rail transport, a train consists of rail vehicles that move along guides to transport freight or passengers from one place to another.
train of thought - the connections that link the various parts of an event or argument together; "I couldn't follow his train of thought"; "he lost the thread of his argument"
Internal monologue, also known as interior monologue, inner voice, internal speech, train of thought, stream of thought, chain of thought or stream of consciousness is thinking in words. It also refers to the semi-constant internal monologue one has with oneself at a conscious or semi-conscious level.
"And yet, O Lord, we perceive intervals of times, and we compare them with themselves, and we say some are longer, others shorter. We even measure by how much shorter or longer this time may be than that; and we answer, 'That this is double or treble, while that is but once, or only as much as that.' But we measure times passing when we measure them by perceiving them; but past times, which now are not, or future times, which as yet are not, who can measure them? Unless, perchance, any one will dare to say, that that can be measured which is not. When, therefore, time is passing, it can be perceived and measured; but when it has passed, it cannot, since it is not."
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