Only when it was imperfect could such things be.

But men may pass through the perfect charm to the perfect union, which is not of time or space.' 'Would you be so very kind,' said Anthea tremulously, 'as to speak so that we can understand you?
The Psammead said something about Rekh-mara not being able to live here, and if he can't get back--' She stopped, her heart was beating desperately in her throat, as it seemed.
'Nobody can continue to live in a land and in a time not appointed,' said the voice of glorious sweetness.

'But a soul may live, if in that other time and land there be found a soul so akin to it as to offer it refuge, in the body of that land and time, that thus they two may be one soul in one body.' The children exchanged discouraged glances.

But the eyes of Rekh-mara and the learned gentleman met, and were kind to each other, and promised each other many things, secret and sacred and very beautiful.
Anthea saw the look.

'Oh, but,' she said, without at all meaning to say it, 'dear Jimmy's soul isn't at all like Rekh-mara's.