esper n.

I'm neither a Lensman nor an esper, but I'd swear that somebody’s peeking over my shoulder half the time.

‘How does he do it?’ ‘I don’t know… Tell me how Espers do it.’

The court is cognizant of the fact that Extra Sensory Experts perform valuable services for society in many walks of life…the Esper Medical Doctor, the Esper Attorney, the Esper Educator, the Esper Criminologist…to mention only a few; yet the Esper expert cannot properly be admitted to any court to give Esper evidence for the record. [both ellipses in original]

Most medicos are highgrade espers, not telepaths. Reading the mind of a patient is not very effective, because the average patient has no real idea of what is wrong with him. An esper digs the trouble out without having his mind all fogged up by some layman’s opinion of what causes the ache and pain.

No man can laugh at the idea of esper powers, as the so-called enlightened once did.

He shook his head, his frown deeper. ‘No, it is true—how could you have known? The matter was only reported to me this morning after the flitter was found. Only a few knew it. But how did she know? Is she esper?’ His suggestion was logical, though I had never known so young an esper to be able to hide such power.

It is a fact some people can sense future events, read the backs of playing cards and so on. But the Esper ability is always quite limited.

He goes to an institute where espers are trained, and consents to participate in an experiment whereby the personality of a dying person is imprinted on the mind of a telepathic recipient.

No machine is proof against an esper. You’ve been winning too damned often.

There was no direct way to test esper ratings in a new species.

Fury struck, anger at the witch who had mangled his son. The world about him dimmed as Rod concentrated on the spell, the compulsion imposed on his son, which had twisted his perceptions into seeing himself as a snake, and made him project his own delusion into other people’s minds—with all the titanic strength of the hybrid esper he was.

‘I sense... a great deal of activity in the commander’s brain,’ Troi said. ‘I apologize. I didn’t mean to intrude.’ ‘Not at all. Vulcan thoughts and emotions can be difficult for esper species to avoid sensing.’