The phrase 'he realised himself' is not grammatically correct in written English.
You should use the phrase 'he realized' or 'he realized himself'. For example, "When John failed his final exam, he realized himself that he had not prepared enough."
It is a doctor that will have told him that his race was over, but he will have realised himself that his chances of winning the race had gone.
It went from a fire to an inferno". Mr Bellshaw said it was then that he realised he himself was in danger.
Despite the advances he had initiated for medicine, he had to realise himself that chronic pain often cannot be controlled sufficiently.
Hadn't young George, too, done everything going into oil, getting into Congress with his father's name and money behind him?There was plenty of his father in him: more, his brother Jeb thinks, than he may even realise himself.
One day he realised he liked himself again.
Having gone incognito in the past on his one-man missions, Omar says he realised that putting himself out there online and giving a face to his actions seemed like the obvious next step in drawing our attention to what he sees as one of the world's greatest injustices: the mass slaughter of animals to fulfil our appetites for sausages, bacon and other meaty treats.
Such was the furore that Example found himself talking about the affair on the radio the next day, only stopping himself when he realised his rationale – how did a project with almost unlimited funds and the best possible contact book end up with such a catastrophically poor track?
When he realised his mistake, he recused himself from a fresh appeal.
Then he realised that old man was himself.
It was only after Argotec embarked on their preparation that he realised what he had let himself in for.
