Explain the line, "Before I had a taste of it, it was vanished" from The Superannuated Man.

This statement quoted from a notable Elian essay, "The Superannuated Man", a celebrated autobiographical essay by the most popular Romantic essayist Charles Lamb, " Prince of English essayists" expresses his feelings and experiences on the 'full week in the summer' vacation.

          "The Superannuated Man" is a pen-picture of Lamb's life before and after superannuation. Lamb had to drudge 'eight, nine and sometimes ten hours a day' for long 'six and thirty years' from fourte,,  'the abundant playtime', 'the frequently intervening vacations of school days' thruogh 'middle age down to decrepitude and silver hairs' in 'the irksome confinement' of the South Sea House and India Office.

    In the hard life of Lamb, holidays are the rarest things. He had his Sundays and three other vacations --- "I had a day of Easter, and a day at Christmas, with a full week in the Summer." This last vacation is the longest and the special privilege to Lamb. And Lamb had been waiting for that particular week through 'fifty one tedious weeks'. This week long vacation had a special impact on his mind and made his 'durance tolerable'. He had 'glittering phanton' to do on those days, but before he had the taste of it, 'it was vanished'. Actually he became excited to ''find out how to make the most of them? Where was the quiet, where the promised rest?" Thus his 'wearisome anxiety' did not allow him to spend his days in 'restless pursuit of pleasure'. Before he could settle himself to his vacatio,  it passed away leaving him restless, pining. He had to reprepare himself for his daily 'thralldom'.       

    Lamb's eager yearning for holidays is well evident here. He rightly refers to the usual human nature to derive maximum pleasure out of the minimum time at disposal. Lamb here gives him personal feelings but it becomes universal. This is actually the experience of all persons grown old in drudgery and craving constantly for relief, a repose. Lamb is here a critic of life and an essayist,  in Bacon's language, "is a critic of life in his own way."