Truth is to say of what is that it is.
But what is the ‘is’ and by what method do we know and say it is?
Marx, Engels and Lenin showed that the ‘is’ is objective, for ever changing, prior to consciousness and, in truth, reflected by it.
We can never step into the same river twice.
Further, what is is driven by contradiction, the engine of Neoplatonic dialectics, developed by Hegel and recognised by the materialist Marx, in the highest yet one-sided development of that philosophical current initiated by Plotinus, as the engine of the world.
To discern the truth is to develop our reason not abstractly but by passing from living perception to abstract thought and then from this to testing the product of that thought in practice.
Ideology – a system of belief delimited by the interests of the most powerful – is the ever-present foe of reason.
To speak the truth is to dialectically reflect in an ever-deepening manner – it was once true that the world is flat – objective reality.